Differences between NET 4 0 and NET 4 5 in High level in NET

Question

Eager to know Differences between  NET 4 0 and  NET 4 5 in High level in  NET and also differences in ASP NET  C  also in these frameworks

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What is new in  NET Framework 4 5  amp   What s new and expected in  NET Framework 4 5    Support for Windows Runtime     Support for Metro Style Applications      Support for Async Programming     Garbage Collector Improvements      Faster ASP NET Startup      Better Data Access Support     WebSockets Support     Workflow Support - BCL Support         differences in ASP NET in these frameworks   Compare What s New in ASP NET 4 and Visual Web Developer and What s New in ASP NET 4 5 and Visual Studio 11 Beta   Asp net 4 0   Web config File Refactoring     Extensible Output Caching     Auto-Start Web Applications     Permanently Redirecting a Page     Shrinking Session State     Expanding the Range of Allowable URLs     Extensible Request Validation      Object Caching and Object Caching Extensibility      Extensible HTML  URL  and HTTP Header Encoding      Performance Monitoring for Individual Applications in a Single Worker Process      Multi-Targeting      etc       And for Asp net 4 5 there is also a long list of improvements    Asynchronously Reading and Writing HTTP Requests and Responses     Improvements to HttpRequest handling     Asynchronously flushing a response      Support for await and Task-Based Asynchronous Modules and Handlers           differences in C  also in these frameworks   Go Through C  4 0 - New C  Features in the  NET Framework and  What s New for Visual C  in Visual Studio 11 Beta   Edit  The languages documentation for C  and VB breaking changes   VB  Visual Basic Breaking Changes in Visual Studio 2012  C   Visual C  Breaking Changes in Visual Studio 2012  Hope this help you get what are you looking for

User · Answer

Here is a great resource from Microsoft which includes a high level features overview for each  NET release since 1 0 up to the present day  It also include information about the associated Visual Studio release and Windows version compatibility    NET Framework Versions and Dependencies

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NET Framework 4    Microsoft announced the intention to ship  NET Framework 4 on 29 September 2008  The Public Beta was released on 20 May 2009    Parallel Extensions to improve support for parallel computing  which target multi-core or distributed systems  To this end  technologies like PLINQ  Parallel LINQ   a parallel implementation of the LINQ engine  and Task Parallel Library  which exposes parallel constructs via method calls   are included  New Visual Basic  NET and C  language features  such as implicit line continuations  dynamic dispatch  named parameters  and optional parameters  Support for Code Contracts  Inclusion of new types to work with arbitrary-precision arithmetic  System Numerics BigInteger  and complex numbers  System Numerics Complex   Introduce Common Language Runtime  CLR  4 0    After the release of the  NET Framework 4  Microsoft released a set of enhancements  named Windows Server AppFabric  for application server capabilities in the form of AppFabric Hosting and in-memory distributed caching support      NET Framework 4 5     NET Framework 4 5 was released on 15 August 2012   a set of new or improved features were added into this version  The  NET Framework 4 5 is only supported on Windows Vista or later  The  NET Framework 4 5 uses Common Language Runtime 4 0  with some additional runtime features   1   NET for Metro style apps  Metro-style apps are designed for specific form factors and leverage the power of the Windows operating system  A subset of the  NET Framework is available for building Metro style apps for Windows 8 using C  or Visual Basic  This subset is called  NET APIs for apps  The version of  NET Framework  runtime and libraries  used for Metro style apps is a part of the new Windows Runtime  which is the new platform and application model for Metro style apps  It is an ecosystem that houses many platforms and languages  including  NET Framework  C   and HTML5 JavaScript   2  Core Features   Ability to limit how long the regular expression engine will attempt  to resolve a regular expression before it times out  Ability to define the culture for an application domain  Console support for Unicode  UTF-16  encoding  Support for versioning of cultural string ordering and comparison data  Better performance when retrieving resources  Zip compression improvements to reduce the size of a compressed file  Ability to customize a reflection context to override default reflection behavior through the CustomReflectionContext class    3  Managed Extensibility Framework  MEF    Support for generic types  Convention-based programming model that enables you to create parts based on naming conventions rather than attributes  Multiple scopes    4  Asynchronous operations  In the  NET Framework 4 5  new asynchronous features were added to the C  and Visual Basic languages  These features add a task-based model for performing asynchronous operations   5  ASP NET   Support for new HTML5 form types  Support for model binders in Web Forms  These let you bind data controls directly to data-access methods  and automatically convert user input to and from  NET Framework data types  Support for unobtrusive JavaScript in client-side validation scripts  Improved handling of client script through bundling and minification for improved page performance  Integrated encoding routines from the AntiXSS library  previously an external library  to protect from cross-site scripting attacks  Support for WebSocket protocol  Support for reading and writing HTTP requests and responses asynchronously  Support for asynchronous modules and handlers  Support for content distribution network  CDN  fallback in the ScriptManager control    6  Networking   Provides a new programming interface for HTTP applications  System Net Http namespace and System Net Http Headers namespaces are added  Other improvements  Improved internationalization and IPv6 support  RFC-compliant URI support  Support for Internationalized Domain Name  IDN  parsing  Support for Email Address Internationalization  EAI     7  Windows Presentation Foundation  WPF    The new Ribbon control  which enables you to implement a ribbon user interface that hosts a Quick Access Toolbar  Application Menu  and tabs  The new INotifyDataErrorInfo interface  which supports synchronous and asynchronous data validation  New features for the VirtualizingPanel and Dispatcher classes  Improved performance when displaying large sets of grouped data  and by accessing collections on non-UI threads  Data binding to static properties  data binding to custom types that implement the ICustomTypeProvider interface and retrieval of data binding information from a binding expression  Repositioning of data as the values change  live shaping   Better integration between WPF and Win32 user interface components  Ability to check whether the data context for an item container is disconnected  Ability to set the amount of time that should elapse between property changes and data source updates  Improved support for implementing weak event patterns  Also  events can now accept markup extensions    8  Windows Communication Foundation  WCF   In the  NET Framework 4 5  the following features have been added to make it simpler to write and maintain Windows Communication Foundation  WCF  applications    Simplification of generated configuration files  Support for contract-first development  Ability to configure ASP NET compatibility mode more easily  Changes in default transport property values to reduce the likelihood that you will have to set them  Updates to the XmlDictionaryReaderQuotas class to reduce the likelihood that you will have to manually configure quotas for XML dictionary readers  Validation of WCF configuration files by Visual Studio as part of the build process  so you can detect configuration errors before you run your application  New asynchronous streaming support  New HTTPS protocol mapping to make it easier to expose an endpoint over HTTPS with Internet Information Services  IIS   Ability to generate metadata in a single WSDL document by appending  singleWSDL to the service URL  Websockets support to enable true bidirectional communication over ports 80 and 443 with performance characteristics similar to the TCP transport  Support for configuring services in code  XML Editor tooltips  ChannelFactory caching support  Binary encoder compression support  Support for a UDP transport that enables developers to write services that use  fire and forget  messaging  A client sends a message to a service and expects no response from the service  Ability to support multiple authentication modes on a single WCF endpoint when using the HTTP transport and transport security  Support for WCF services that use internationalized domain names  IDNs     9  Tools   Resource File Generator  Resgen exe  enables you to create a  resw file for use in Windows Store apps from a  resources file embedded in a  NET Framework assembly  Managed Profile Guided Optimization  Mpgo exe  enables you to improve application startup time  memory utilization  working set size   and throughput by optimizing native image assemblies  The command-line tool generates profile data for native image application assemblies      For more information and access to reference links  please visit      NET Framework version history What s New in the  NET Framework 4 5  NET Framework Versions and Dependencies               Net 4 5 Poster

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This answer may be late reply but it will be useful for seeing this topic in future   The features of  NET framework 4 5 can be seen in the following link   To summarize         Installation       NET Framework 4 5 does not support Windows XP or Windows Server 2003  and therefore  if you have to create applications that target these operating systems  you will need to stay with  NET Framework 4 0  In contrast  Windows 8 and Windows Server 2012 in all of their editions include  NET Framework 4 5    Support for Arrays Larger than 2 GB on 64-bit Platforms   Enhanced Background Server Garbage Collection   Support for Timeouts in Regular Expression Evaluations   Support for Unicode 6 0 0 in Culture-Sensitive Sorting and Casing Rules on Windows 8   Simple Default Culture Definition for an Application Domain   Internationalized Domain Names in Windows 8 Apps

User · Answer

You can find the latest features of the  NET Framework 4 5 beta here  It breaks down the changes to the framework in the following categories     NET for Metro style Apps Portable Class Libraries Core New Features and Improvements Parallel Computing Web Networking Windows Presentation Foundation  WPF  Windows Communication Foundation  WCF  Windows Workflow Foundation  WF    You sound like you are more interested in the Web section as this shows the changes to ASP NET 4 5  The rest of the changes can be found under the other headings   You can also see some of the features that were new when the  NET Framework 4 0 was shipped here

[.net] Differences between .NET 4.0 and .NET 4.5 in High level in .NET

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